what are some songs that use this technique and what are some good ways to find out what sounds good?
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Quote by rockintill2
what are some songs that use this technique

If you feel like tuning to Open-E (low to high: E B E G# B e) try Statesboro Blues by the Allman Brothers. Good slide blues licks.

For standard tuning, My Sweet Lord by George Harrison is pretty easy and well-known. The solo from Dreams by the Allman Brothers can also be done in standard, and it's very nice.

Quote by rockintill2
and what are some good ways to find out what sounds good?

You'll have to be a bit more specific... are you asking for good slide technique?

edit: I don't know how helpful this is, but you can look around here and see if there's anything useful. https://www.ultimate-guitar.com/forum/showthread.php?t=425035
(Slightly outdated) Electronic and classical compositions by m'self: Check 'em out
There's not a whole lot of slide in it, but "Big Empty" by Stone Temple Pilots is a pretty good song.
Led zeppelin has some good slide songs, Scar tissue solo, free bird or make something up.
If you want slide to sound good, raise your action.
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Freebird - Lynyrd Skynard?
Also includes quite some slide-work
tune to open g DGDGBd and play around with the open 7th and 5th positions just use your ears or buy a book/ get lessons
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In My Time Of Dying - Zeppelin

Whole song is played with a slide. Think Dancing Days uses a slide too but I'm not sure.
have a look on 12bar.de as that has some simple slide stuff on there.
Also the scar tissue solo uses slide in it, as has been said above.
Just learn some old blues songs. when you get really good, learn some derek trucks!
when u play slide guitar u really gotta have a jelly wrist so u can move around, find the sounds u like, u should also be thinking country and delta blues when playing slide, look at Freebird, When the Levee Breaks, In My Time of Dying and Travelling Riverside Blues, and noodle around the 5th, 7th, and 9th frets making riffs and cool sounds, good luck slide rocks